Look up the location that we have for a postcode. If we don't have an exact match for the postcode you request, then we will do our best. If we don't have an exact match, we will return #s where we don't have exact matches.
If you request the response with the format of 'js', then you can specify the name of a funtion call to wrap around the JSON response. This will call that method with the JSON as a parameter.
# Easting,Northing,Matched Postcode 434807,219133,'OX7 3##'
Try out this method without writing any code.